As networks power more demanding devices, from PTZ cameras and high-performance WiFi access points to PoE lighting and A/V equipment, choosing the right PoE injector requires more than looking at the wattage.

Before you buy, there are four key specifications to check: form factor, per-port power, total power budget, and the power required by the injector itself.

For PoE++ . . .

What Can You Power With High-Power PoE++?

With up to 90W available per port, PoE++ is built for applications that demand more than standard PoE can provide, like . . .

PTZ Cameras: Support high-power cameras with features such as heaters, blowers, and infrared.

High-Performance WiFi: Power demanding wireless access points while keeping data and power on the same Ethernet connection.

PoE Lighting: Connect and power networked LED lighting for smart building applications.

A/V Over IP: Power network-connected displays, touch panels, controllers, and other A/V equipment.

Check the Form Factor

First, make sure the injector fits your installation.

Rack-mounted PoE injectors are typically measured in rack units, or U. A 1U unit takes up one rack unit of vertical space, while a 2U unit takes up two. If rack space is limited, a compact design can make a significant difference.

Check Per-Port Power for 4-Pair PoE and PoE++

Next, determine how much power each connected device requires.

Standard PoE and PoE+ are suitable for many everyday devices, but higher-power applications may require IEEE 802.3bt PoE++. Check your device specifications to determine the required wattage per port.

Calculate Your Total Power Budget

Per-port power is only part of the equation. You also need to calculate how much power all your connected devices will require at the same time.

For example:

• 4 devices × 60W = 240W

• 4 devices × 30W = 120W

• 4 devices × 15W = 60W

Total required power: 420W

Your injector needs a total power budget that can handle the combined load.

Check the Injector's Power Requirements

Finally, don't forget to look at the power requirements of the injector itself.

Check its input voltage, power supply configuration, and total capacity to make sure your installation can support the injector and its connected devices.

Key Features of the 1200W GBT-12 Injector

• High Density: 12 ports in a compact 1U rackmount form factor.

• Massive Power Budget: A total shared capacity of 1200 Watts, ensuring you don’t run out of “juice” when all devices are active.

• Active Negotiation: This is critical. The injector “talks” to the device before sending power. If you accidentally plug in a laptop or a non-PoE device, the injector won’t send high voltage, protecting your hardware.

• Redundancy: The kit includes two UL-approved 53V 600W power supplies, providing a layer of safety for mission-critical applications.